[jira] [Created] (FLINK-15038) Get field DataType of TableSchema should return DataType with default conversion class

[Shang Yuanchun (Jira)]

Jingsong Lee created FLINK-15038:
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             Summary: Get field DataType of TableSchema should return DataType with default conversion class
                 Key: FLINK-15038
                 URL: https://issues.apache.org/jira/browse/FLINK-15038
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
            Reporter: Jingsong Lee
             Fix For: 1.10.0


Now, the user and planner construct TableSchema with various DataTypes, them maybe have various conversion classes.

For example, return DataType of Functions maybe with various TypeInformations and lead to various conversion classes.

TableSchema should only have logical informations instead of various conversion classes.

This ticket want to clean the field DataType in TableSchema and return a consistent conversion classes to users.

Modify:

getFieldDataTypes/getFieldDataType/toRowDataType in TableSchema.

Before return, we can bridgeTo default conversion class using TypeConversions.fromLogicalToDataType(type.getLogicalType()).



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